Boiler equipment for the heating function is considered the most productive and efficient. Unlike classic home heaters, most of these units can form the main heating system, and not just the auxiliary one. But there are also downsides to such equipment. It costs more and requires more energy. From the point of view of economic feasibility, the best solution would be a gas boiler with a closed combustion chamber, which also has a high degree of safety. This is a modern variation of the traditional combustion system, but with a number of structural modifications and improvements.
Boiler device
The general arrangement of the unit is generally similar to models operating with an open firebox. In the simplest modification, a single-circuit gas boiler with a closed combustion chamber has three components. This is the chamber itself and its infrastructure, two expansion tanks and a storage tank. Added to this is the pipeline infrastructure that provides a link between theseelements and at the same time can act as a conductor of heat throughout the house.
The basis of the boiler block is a burner, which does not work from oxygen in the room, but from the air supply from outside. This explains the high reliability of this equipment. Depending on the requirements, a double-circuit gas boiler with a closed combustion chamber, additionally equipped with nodes for providing hot water supply, can also be effective. Such models are more expensive and more problematic to install, but more productive and functional. To provide a similar task of hot water supply due to a single-circuit boiler, an additional installation of a boiler will be required, which will be more expensive.
Working principle
Most often, these boilers are used to service two systems. First of all, this is a heating function, which is performed by both single and double-circuit systems. The second option is also able to work to provide domestic hot water. In both cases, the basis of the boiler is a flare gas burner. It works from the central gas pipeline or from the tank filled with liquefied fuel. A modern gas boiler with a closed combustion chamber is equipped with an electromagnetic valve element that allows you to automatically stabilize the function of the unit. Since gas equipment is considered the most dangerous in terms of daily operation, closed burner models seek to minimize risks in all aspects, and the presence of valves is one of the main protective features. After the burner has completed its task of heating, the water is sent through circuits to the appropriate tanks, or else distributed to circulate around the house.
Fume extraction system
In boilers with a traditional combustion system and natural exhaust, the smoke removal of their gas burner device through the inner surface of the heat exchanger is provided. This function is to some extent regulated by the draft stabilizer, coupled with the flue duct. In the latest versions of the aggregates, this mechanism has been improved. So, even a budgetary single-circuit wall-mounted gas boiler can be equipped with a productive exhaust fan with a pressure sensor. The safety mechanism can cut off the fuel supply to the burner if ventilation problems are detected.
Automatic
Automated systems are implemented to provide two types of functions - control and safety. In the first case, sensors and controllers set the optimal, from the point of view of the user program, system operation parameters. In particular, they set the desired ignition mode, control the power of the burner, adjust the volume of water for circulation, etc. As for security systems, a gas boiler with a closed combustion chamber in this part is mainly protected from dangerous situations that may arise during the process. operation. For example, special sensors can turn off the burner if the flame goes out. Even if deviations in the operation of the flame control system are detectedthe safety sensor can disable the boiler. The same applies to cases of insufficient coolant flow, in case of violations in the removal of smoke, in case of overheating of the unit, etc.
Varieties
Differences between single and double circuit models have already been considered, but this equipment also differs in the type of placement method. In particular, floor and wall units are popular. If it is planned to purchase a powerful and productive assistant for servicing hot water and heat of a large house, then it is better to choose a floor-standing gas boiler with a closed combustion chamber with a large tank. Installation on a solid screed or other foundation assumes the physical stability of the operation of the device - accordingly, it makes no sense to save on the working potential of the equipment.
Wall-mounted models are advantageous in that they save space, although some versions can also cause a lot of problems in terms of installation. It all depends on the model of the unit and the materials of the local finish. In addition, a wall-mounted gas boiler with a closed combustion chamber rarely has high power - most often these are single-circuit models. Therefore, this option will be beneficial in the heating infrastructure of a small private house or one room.
Operating instructions
To begin with, it should be noted that the boiler should be located only in rooms intended for this kind of equipment. Is notthere must be a technical room - the unit can be installed in a bathroom, kitchen, utility room or garage. The main thing is that the conditions in this place do not contradict the fire safety rules. It is possible to use a gas boiler with a closed combustion chamber when all heating and water supply circuits are connected. User interaction with the equipment is realized by means of special relays and control panels. Usually these parts are equipped with ergonomic regulators with sensors and indicators of boiler operating parameters. For example, volumes of coolant, temperature, burner operation mode, etc. are indicated.
Producers and prices
There are many worthy offers from Bosch, Baxi, Protherm, Vaillant and others on the domestic market. For the most part, these are wall-mounted models that are distinguished by their modest dimensions and at the same time high performance. For example, the Gaz 7000W modification from Bosch has a power potential of 35 kW, which is enough to service houses with a total area of up to 350 m2. In terms of cost, of course, this equipment is not the most attractive. For example, a gas boiler with a closed combustion chamber, the price of which is 20-25 thousand rubles, is considered budgetary. Solid versions from major brands are estimated at 40-50 thousand. But, operating practice shows that these costs justify themselves in the long term.
Conclusion
The use of gas equipment provides several significant advantages. Firstly, gas consumption with access to a central supply line will be inexpensive - at least compared to electrical equipment. Secondly, even a low-power single-circuit wall-mounted gas boiler, with proper organization of the contour scheme, can provide a medium-sized house with heat. Again, if the circulation is correctly calculated, then the need for additional point sources of heating may also disappear. But for large houses, it is still desirable to turn to double-circuit complexes with capacious drives. This is a multifunctional equipment that will solve several problems at once in the maintenance of private households.
